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/*
* Copyright (C) 2010 Google Inc. All Rights Reserved.
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#pragma once
#include "HTMLFormElement.h"
#include "TouchList.h"
#include <wtf/TZoneMalloc.h>
namespace WebCore {
class EventContext {
WTF_MAKE_TZONE_ALLOCATED(EventContext);
public:
using EventInvokePhase = EventTarget::EventInvokePhase;
enum class Type : uint8_t {
Normal = 0,
MouseOrFocus,
Touch,
Window,
};
EventContext(Type, Node*, EventTarget* currentTarget, EventTarget* origin, int closedShadowDepth);
EventContext(Type, Node&, Node* currentTarget, EventTarget* origin, int closedShadowDepth);
~EventContext() = default;
Node* node() const { return m_node.get(); }
RefPtr<Node> protectedNode() const { return m_node; }
EventTarget* currentTarget() const { return m_currentTarget.get(); }
RefPtr<EventTarget> protectedCurrentTarget() const { return m_currentTarget; }
bool isCurrentTargetInShadowTree() const { return m_currentTargetIsInShadowTree; }
EventTarget* target() const { return m_target.get(); }
RefPtr<EventTarget> protectedTarget() const { return m_target; }
int closedShadowDepth() const { return m_closedShadowDepth; }
void handleLocalEvents(Event&, EventInvokePhase) const;
bool isNormalEventContext() const { return m_type == Type::Normal; }
bool isMouseOrFocusEventContext() const { return m_type == Type::MouseOrFocus; }
bool isTouchEventContext() const { return m_type == Type::Touch; }
bool isWindowContext() const { return m_type == Type::Window; }
Node* relatedTarget() const { return m_relatedTarget.get(); }
RefPtr<Node> protectedRelatedTarget() const { return m_relatedTarget; }
void setRelatedTarget(RefPtr<Node>&&);
#if ENABLE(TOUCH_EVENTS)
enum class TouchListType : uint8_t { Touches, TargetTouches, ChangedTouches };
TouchList& touchList(TouchListType);
#endif
private:
inline EventContext(Type, Node* currentNode, RefPtr<EventTarget>&& currentTarget, EventTarget* origin, int closedShadowDepth, bool currentTargetIsInShadowTree = false);
#if ENABLE(TOUCH_EVENTS)
void initializeTouchLists();
#endif
#if ASSERT_ENABLED
bool isUnreachableNode(EventTarget*) const;
#endif
RefPtr<Node> m_node;
RefPtr<EventTarget> m_currentTarget;
RefPtr<EventTarget> m_target;
RefPtr<Node> m_relatedTarget;
#if ENABLE(TOUCH_EVENTS)
RefPtr<TouchList> m_touches;
RefPtr<TouchList> m_targetTouches;
RefPtr<TouchList> m_changedTouches;
#endif
int m_closedShadowDepth { 0 };
bool m_currentTargetIsInShadowTree { false };
bool m_contextNodeIsFormElement { false };
bool m_relatedTargetIsSet { false };
Type m_type { Type::Normal };
};
inline EventContext::EventContext(Type type, Node* node, RefPtr<EventTarget>&& currentTarget, EventTarget* origin, int closedShadowDepth, bool currentTargetIsInShadowTree)
: m_node { node }
, m_currentTarget { WTFMove(currentTarget) }
, m_target { origin }
, m_closedShadowDepth { closedShadowDepth }
, m_currentTargetIsInShadowTree { currentTargetIsInShadowTree }
, m_type { type }
{
ASSERT(!isUnreachableNode(m_target.get()));
#if ENABLE(TOUCH_EVENTS)
if (m_type == Type::Touch)
initializeTouchLists();
#else
ASSERT(m_type != Type::Touch);
#endif
}
inline EventContext::EventContext(Type type, Node* node, EventTarget* currentTarget, EventTarget* origin, int closedShadowDepth)
: EventContext(type, node, RefPtr { currentTarget }, origin, closedShadowDepth)
{
}
// This variant avoids calling EventTarget::ref() which is a virtual function call.
inline EventContext::EventContext(Type type, Node& node, Node* currentTarget, EventTarget* origin, int closedShadowDepth)
: EventContext(type, &node, RefPtr { currentTarget }, origin, closedShadowDepth, currentTarget && currentTarget->isInShadowTree())
{
m_contextNodeIsFormElement = is<HTMLFormElement>(node);
}
inline void EventContext::setRelatedTarget(RefPtr<Node>&& relatedTarget)
{
ASSERT(!isUnreachableNode(relatedTarget.get()));
m_relatedTarget = WTFMove(relatedTarget);
m_relatedTargetIsSet = true;
}
#if ENABLE(TOUCH_EVENTS)
inline TouchList& EventContext::touchList(TouchListType type)
{
switch (type) {
case TouchListType::Touches:
return *m_touches;
case TouchListType::TargetTouches:
return *m_targetTouches;
case TouchListType::ChangedTouches:
return *m_changedTouches;
}
ASSERT_NOT_REACHED();
return *m_touches;
}
#endif
} // namespace WebCore
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